EP1138649A3 - Mn-Zn ferrite and production process thereof - Google Patents

Mn-Zn ferrite and production process thereof Download PDF

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Publication number
EP1138649A3
EP1138649A3 EP01102463A EP01102463A EP1138649A3 EP 1138649 A3 EP1138649 A3 EP 1138649A3 EP 01102463 A EP01102463 A EP 01102463A EP 01102463 A EP01102463 A EP 01102463A EP 1138649 A3 EP1138649 A3 EP 1138649A3
Authority
EP
European Patent Office
Prior art keywords
ferrite
mol
khz
mhz
production process
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01102463A
Other languages
German (de)
French (fr)
Other versions
EP1138649B1 (en
EP1138649A2 (en
Inventor
Osamu c/o Minebea Co. Ltd. Kobayashi
Osamu c/o Minebea Co. Ltd. Yamada
Kiyoshi c/o Minebea Co. Ltd. Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minebea Co Ltd
Original Assignee
Minebea Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minebea Co Ltd filed Critical Minebea Co Ltd
Publication of EP1138649A2 publication Critical patent/EP1138649A2/en
Publication of EP1138649A3 publication Critical patent/EP1138649A3/en
Application granted granted Critical
Publication of EP1138649B1 publication Critical patent/EP1138649B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)

Abstract

The present invention provides a Mn-Zn ferrite having an electrical resistivity exceeding 1 Ωm order and having a high initial permeability of 3000 or more at 100 kHz and 100 or more at 10 MHz. The main components of the Mn-Zn ferrite are 44.0 to 49.8 mol% Fe2O3, 15.0 to 26.5 mol% ZnO, 0.02 to 1.00 mol% Mn2O3 and the remainder MnO. The Mn-Zn ferrite is enabled to be used in a wide frequency region from 100 kHz to 10 MHz by limiting Fe2O3 content to less than 50 mol% that is the stoichiometric composition and inhibiting formation of Mn2O3.
EP01102463A 2000-02-08 2001-02-03 Mn-Zn ferrite and production process thereof Expired - Lifetime EP1138649B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000030389A JP3584439B2 (en) 2000-02-08 2000-02-08 Mn-Zn ferrite and method for producing the same
JP2000030389 2000-02-08

Publications (3)

Publication Number Publication Date
EP1138649A2 EP1138649A2 (en) 2001-10-04
EP1138649A3 true EP1138649A3 (en) 2002-05-15
EP1138649B1 EP1138649B1 (en) 2004-12-29

Family

ID=18555407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01102463A Expired - Lifetime EP1138649B1 (en) 2000-02-08 2001-02-03 Mn-Zn ferrite and production process thereof

Country Status (4)

Country Link
US (1) US6547984B2 (en)
EP (1) EP1138649B1 (en)
JP (1) JP3584439B2 (en)
DE (1) DE60107992T2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002167271A (en) * 2000-11-28 2002-06-11 Minebea Co Ltd METHOD OF MANUFACTURING Mn-Zn FERRITE
JP2003068515A (en) * 2001-08-22 2003-03-07 Minebea Co Ltd Mn-Zn FERRITE AND WINDING COMPONENT
JP2004140006A (en) * 2002-10-15 2004-05-13 Minebea Co Ltd Common mode choke coil and line filter
JP2004247371A (en) * 2003-02-12 2004-09-02 Minebea Co Ltd MnZn FERRITE
EP1569249A1 (en) * 2003-09-22 2005-08-31 MINEBEA Co., Ltd. Bead noise filter
JP2005179098A (en) * 2003-12-17 2005-07-07 Jfe Steel Kk Mn-Ni-Zn BASED FERRITE
JP5183856B2 (en) * 2004-03-11 2013-04-17 Ｊｆｅケミカル株式会社 Method for producing Mn-Zn ferrite
US20080109309A1 (en) * 2006-10-31 2008-05-08 Steven Landau Powered Print Advertisements, Product Packaging, and Trading Cards
KR20090076994A (en) * 2006-10-31 2009-07-13 솔리코어 인코포레이티드 Powered authenticating cards
WO2008082616A1 (en) * 2006-12-29 2008-07-10 Solicore, Inc. Card configured to receive separate battery
WO2008082617A2 (en) * 2006-12-29 2008-07-10 Solicore, Inc. Mailing apparatus for powered cards
CN103597558B (en) * 2011-06-15 2017-05-03 株式会社村田制作所 Multilayer coil part
CN103608876B (en) 2011-06-15 2017-08-15 株式会社村田制作所 The manufacture method of multilayer coil component and the multilayer coil component
CN104124028B (en) * 2014-06-25 2016-11-16 张丽琴 A kind of molybdenum-base rare earth ferromagnetic core material
CN112374879B (en) * 2020-11-12 2022-12-23 南通三优佳磁业有限公司 Preparation method of anti-electromagnetic interference manganese-zinc ferrite material
CN115650715A (en) * 2022-10-25 2023-01-31 山东春光磁电科技有限公司 Broadband high-impedance high-resistivity manganese-zinc ferrite material and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07230909A (en) * 1994-02-18 1995-08-29 Tdk Corp Manganese-zinc ferrite core and its manufacture
WO1998032140A1 (en) * 1997-01-21 1998-07-23 Fdk Corporation Ferrite material, method of manufacturing the same and deflection yoke core made from the material
EP1043287A1 (en) * 1999-04-05 2000-10-11 Minebea Co., Ltd. Process for producing Mn-Zn ferrite
EP1101736A1 (en) * 1999-11-19 2001-05-23 Minebea Co., Ltd. Mn-Zn ferrite and production thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1304237A (en) 1970-09-02 1973-01-24
JP3771952B2 (en) 1995-06-28 2006-05-10 ソニー株式会社 Method for growing single crystal III-V compound semiconductor layer, method for manufacturing light emitting element, and method for manufacturing transistor
JP3247930B2 (en) 1995-12-27 2002-01-21 川崎製鉄株式会社 Mn-Zn soft ferrite
JPH11199235A (en) 1998-01-16 1999-07-27 Fuji Elelctrochem Co Ltd Ferrite material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07230909A (en) * 1994-02-18 1995-08-29 Tdk Corp Manganese-zinc ferrite core and its manufacture
WO1998032140A1 (en) * 1997-01-21 1998-07-23 Fdk Corporation Ferrite material, method of manufacturing the same and deflection yoke core made from the material
US20020008336A1 (en) * 1997-01-21 2002-01-24 Shuichi Otobe Ferrite material, method of manufacturing the same and deflection yoke core made from the material
EP1043287A1 (en) * 1999-04-05 2000-10-11 Minebea Co., Ltd. Process for producing Mn-Zn ferrite
EP1101736A1 (en) * 1999-11-19 2001-05-23 Minebea Co., Ltd. Mn-Zn ferrite and production thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KIMURA O ET AL: "FORMATION OF COMMERCIAL MN-ZN FERRITES", ADVANCES IN CERAMICS, WESTERVILLE,OH, US, 1985, pages 115 - 119, XP008001460 *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26) *

Also Published As

Publication number Publication date
US6547984B2 (en) 2003-04-15
JP2001220222A (en) 2001-08-14
EP1138649B1 (en) 2004-12-29
JP3584439B2 (en) 2004-11-04
US20010025944A1 (en) 2001-10-04
DE60107992D1 (en) 2005-02-03
DE60107992T2 (en) 2006-04-27
EP1138649A2 (en) 2001-10-04

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